sound/isa/adlib.c

   1 /*
   2  * AdLib FM card driver.
   3  */
   4
   5 #include <sound/driver.h>
   6 #include <linux/kernel.h>
   7 #include <linux/module.h>
   8 #include <linux/platform_device.h>
   9 #include <sound/core.h>
  10 #include <sound/initval.h>
  11 #include <sound/opl3.h>
  12
  13 #define CRD_NAME "AdLib FM"
  14 #define DRV_NAME "snd_adlib"
  15
  16 MODULE_DESCRIPTION(CRD_NAME);
  17 MODULE_AUTHOR("Rene Herman");
  18 MODULE_LICENSE("GPL");
  19
  20 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  21 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  22 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;
  23 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
  24
  25 module_param_array(index, int, NULL, 0444);
  26 MODULE_PARM_DESC(index, "Index value for " CRD_NAME " soundcard.");
  27 module_param_array(id, charp, NULL, 0444);
  28 MODULE_PARM_DESC(id, "ID string for " CRD_NAME " soundcard.");
  29 module_param_array(enable, bool, NULL, 0444);
  30 MODULE_PARM_DESC(enable, "Enable " CRD_NAME " soundcard.");
  31 module_param_array(port, long, NULL, 0444);
  32 MODULE_PARM_DESC(port, "Port # for " CRD_NAME " driver.");
  33
  34 static struct platform_device *devices[SNDRV_CARDS];
  35
  36 static void snd_adlib_free(struct snd_card *card)
  37 {
  38         release_and_free_resource(card->private_data);
  39 }
  40
  41 static int __devinit snd_adlib_probe(struct platform_device *device)
  42 {
  43         struct snd_card *card;
  44         struct snd_opl3 *opl3;
  45
  46         int error, i = device->id;
  47
  48         if (port[i] == SNDRV_AUTO_PORT) {
  49                 snd_printk(KERN_ERR DRV_NAME ": please specify port\n");
  50                 error = -EINVAL;
  51                 goto out0;
  52         }
  53
  54         card = snd_card_new(index[i], id[i], THIS_MODULE, 0);
  55         if (!card) {
  56                 snd_printk(KERN_ERR DRV_NAME ": could not create card\n");
  57                 error = -EINVAL;
  58                 goto out0;
  59         }
  60
  61         card->private_data = request_region(port[i], 4, CRD_NAME);
  62         if (!card->private_data) {
  63                 snd_printk(KERN_ERR DRV_NAME ": could not grab ports\n");
  64                 error = -EBUSY;
  65                 goto out1;
  66         }
  67         card->private_free = snd_adlib_free;
  68
  69         error = snd_opl3_create(card, port[i], port[i] + 2, OPL3_HW_AUTO, 1, &opl3);
  70         if (error < 0) {
  71                 snd_printk(KERN_ERR DRV_NAME ": could not create OPL\n");
  72                 goto out1;
  73         }
  74
  75         error = snd_opl3_hwdep_new(opl3, 0, 0, NULL);
  76         if (error < 0) {
  77                 snd_printk(KERN_ERR DRV_NAME ": could not create FM\n");
  78                 goto out1;
  79         }
  80
  81         strcpy(card->driver, DRV_NAME);
  82         strcpy(card->shortname, CRD_NAME);
  83         sprintf(card->longname, CRD_NAME " at %#lx", port[i]);
  84
  85         snd_card_set_dev(card, &device->dev);
  86
  87         error = snd_card_register(card);
  88         if (error < 0) {
  89                 snd_printk(KERN_ERR DRV_NAME ": could not register card\n");
  90                 goto out1;
  91         }
  92
  93         platform_set_drvdata(device, card);
  94         return 0;
  95
  96 out1:   snd_card_free(card);
  97 out0:   return error;
  98 }
  99
 100 static int __devexit snd_adlib_remove(struct platform_device *device)
 101 {
 102         snd_card_free(platform_get_drvdata(device));
 103         platform_set_drvdata(device, NULL);
 104         return 0;
 105 }
 106
 107 static struct platform_driver snd_adlib_driver = {
 108         .probe          = snd_adlib_probe,
 109         .remove         = __devexit_p(snd_adlib_remove),
 110
 111         .driver         = {
 112                 .name   = DRV_NAME
 113         }
 114 };
 115
 116 static int __init alsa_card_adlib_init(void)
 117 {
 118         int i, cards;
 119
 120         if (platform_driver_register(&snd_adlib_driver) < 0) {
 121                 snd_printk(KERN_ERR DRV_NAME ": could not register driver\n");
 122                 return -ENODEV;
 123         }
 124
 125         for (cards = 0, i = 0; i < SNDRV_CARDS; i++) {
 126                 struct platform_device *device;
 127
 128                 if (!enable[i])
 129                         continue;
 130
 131                 device = platform_device_register_simple(DRV_NAME, i, NULL, 0);
 132                 if (IS_ERR(device))
 133                         continue;
 134
 135                 if (!platform_get_drvdata(device)) {
 136                         platform_device_unregister(device);
 137                         continue;
 138                 }
 139
 140                 devices[i] = device;
 141                 cards++;
 142         }
 143
 144         if (!cards) {
 145 #ifdef MODULE
 146                 printk(KERN_ERR CRD_NAME " soundcard not found or device busy\n");
 147 #endif
 148                 platform_driver_unregister(&snd_adlib_driver);
 149                 return -ENODEV;
 150         }
 151         return 0;
 152 }
 153
 154 static void __exit alsa_card_adlib_exit(void)
 155 {
 156         int i;
 157
 158         for (i = 0; i < SNDRV_CARDS; i++)
 159                 platform_device_unregister(devices[i]);
 160         platform_driver_unregister(&snd_adlib_driver);
 161 }
 162
 163 module_init(alsa_card_adlib_init);
 164 module_exit(alsa_card_adlib_exit);